15
Connection sequence
1. Main Battery “MAIN I” (must be connected):
•
Connect the battery terminals
of the charge controller +
(positive) & - (negative) to the 12v main battery, observing
the correct polarity and the cross section of the cables (refer
to connection plan on page 2).
•
Never operate the controller without the battery “Main I”
connected. If the battery is not connected, the unit will not
deliver a defined output voltage.
•
In case of wrong polarity of battery I, the internal safety fuse
will be released. The replacement fuse should have the
same capacity, and it should be of the same type of
automobile fuse.
•
Parallel charging
of two or several batteries of the same
voltage (12v) is admissible. The batteries are to be
“paralleled” in connection.
2. Solar Panel (must be connected):
•
Shade the panels to minimize sparking during connection
and to avoid damages due to eventual wrong polarity.
Observe the cable cross-sections (refer to connection
plan)!
•
If several small solar panels are used, they are connected
in parallel (refer to connection plan). Partial shading of the
panels results in average higher capacity (see connection
plan).
3. Starter Battery START II (Option, can be connected):
•
Connect the second charging port to the second battery
using the red connection cable (wire cross section 1.5 -
2.5 mm²). This cable may be longer. In case of non-
utilization, this terminal is left free.
•
If used, the output for starter battery II will be working with
reduced voltage and charging current rates. Thus, the main
solar power will be supplied to main battery being more
suitable.
•
However, the vehicles starter battery II will be kept in a
condition, that starting will always be possible, even in case of
longer downtimes and during winter operation.
•
Connection of the negative pole „START II“ is not required, if
the negative pole „BOARD I“ is connected to the vehicle body.
Depending on the length of the cable, it may also be
connected to the common negative connection of the solar
controller or to the negative pole of „BOARD I“.
4. Temperature Sensor (Optional, can be connected):
•
For automatic adaptation and correction of the charging
voltage to the battery temperature (temperature
compensation).
•
Mounting: the thermal contact of sensor and battery "Main
I" (inside temperature) should be well. Thus, it should be
screwed down to the negative pole or positive pole of the
battery. It is also possible to fasten it at the sidewall
centre of the battery casing. Ensure that the installation
place is not influenced by any source of heat (motor block,
exhaust, heater etc.).
•
Connection: Connect the temperature sensor to the
terminal by means of a 2-pole cable (cable cross section
0.5 - 1.5 mm²). The polarity and cable length are of no
importance. The solar controller recognizes the sensor
automatically.
•
Effect: The temperature-dependent charging voltage of
battery I will be adapted automatically to the battery
temperature. The temperature sensor measures the battery
temperature. In case of low temperatures (winter operation),
the charging voltage will be increased in order to improve
and accelerate full charging of the weak battery.
Summary of Contents for SDC12
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